Home / 13,779.51-20,665.62-5,986.50

Finding the Fourth Proportional to 13,779.51, 20,665.62 and 5,986.50

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Solution

The fourth proportional to 13,779.51, 20,665.62 and 5,986.50 is: 8,978.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.51 : 20,665.62 = 5,986.50 : x
  2. Step 2: Convert to fraction form
    13,779.51/20,665.62 = 5,986.50/x
  3. Step 3: Cross multiply
    13,779.51x = 20,665.62 × 5,986.50
  4. Step 4: Simplify right side
    13,779.51x = 123,714,734.13
  5. Step 5: Solve for x
    x = 123,714,734.13/13,779.51
  6. Step 6: Final answer
    x = 8,978.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.